Like most, I have different email addresses for various reasons and previously I would login to each of them on every email client I used. This setup isn’t great and makes it difficult to manage them all and migrate messages between them. Now I just have Fastmail grab the mail from them all and funnel them into one place.
I made the same change recently and it’s so nice. I have just two accounts that I login to in each of my email clients now — my personal, Fastmail account and my work account. That’s it.
And unlike Hey, which seems to be the new hip email service, I can use any IMAP client to check my email. To be fair, none of them are particularly great, but at least I have options.